23131022011 has 4 divisors (see below), whose sum is σ = 23141728024. Its totient is φ = 23120316000.

The previous prime is 23131021897. The next prime is 23131022017. The reversal of 23131022011 is 11022013132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23131022011 - 2⁷ = 23131021883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131022017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349765 + ... + 5354086.

It is an arithmetic number, because the mean of its divisors is an integer number (5785432006).

Almost surely, 2^23131022011 is an apocalyptic number.

23131022011 is a deficient number, since it is larger than the sum of its proper divisors (10706013).

23131022011 is a wasteful number, since it uses less digits than its factorization.

23131022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10706012.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23131022011 its reverse (11022013132), we get a palindrome (34153035143).

The spelling of 23131022011 in words is "twenty-three billion, one hundred thirty-one million, twenty-two thousand, eleven".